Docs: Fix error of user guide document

- Update binary image filepath when creating a unified hex file.
- Fix an address value error of MPS3 FPGA board test configuration.
  According to AN524 flash layout, the parameter IMAGE1ADDRESS
  is 0x000C0000.
  ```
   # Flash layout of AN524 without BL2
   #
   # 0x0000_0000 Secure image             (512 KB)
   # 0x000C_0000 Non-secure image         (256 KB)
  ```

Change-Id: Iaeb95843db51da81593875e06fb62fca8d16eb2c
Signed-off-by: Mingyang Sun <mingyang.sun@arm.com>
1 file changed